InitialThreadLocal.java |
1 /** 2 * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a copy 5 * of this software and associated documentation files (the "Software"), to deal 6 * in the Software without restriction, including without limitation the rights 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 8 * copies of the Software, and to permit persons to whom the Software is 9 * furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 20 * SOFTWARE. 21 */ 22 23 package com.liferay.portal.kernel.util; 24 25 import com.liferay.portal.kernel.log.Log; 26 import com.liferay.portal.kernel.log.LogFactoryUtil; 27 28 import java.lang.Cloneable; 29 import java.lang.reflect.Method; 30 31 /** 32 * <a href="InitialThreadLocal.java.html"><b><i>View Source</i></b></a> 33 * 34 * @author Brian Wing Shun Chan 35 */ 36 public class InitialThreadLocal<T> extends ThreadLocal<T> { 37 38 public InitialThreadLocal(T initialValue) { 39 _initialValue = initialValue; 40 } 41 42 protected T initialValue() { 43 if (_initialValue instanceof Cloneable) { 44 try { 45 Method method = _initialValue.getClass().getMethod( 46 _METHOD_CLONE); 47 48 return (T)method.invoke(_initialValue); 49 } 50 catch (Exception e) { 51 _log.error(e, e); 52 } 53 } 54 55 return _initialValue; 56 } 57 58 private static final String _METHOD_CLONE = "clone"; 59 60 private static Log _log = LogFactoryUtil.getLog(InitialThreadLocal.class); 61 62 private T _initialValue; 63 64 }